I have strange issue using either Wine from Debian repository or stable release from winehq repository. Using QQ International v2.11 from Tencent I have behavior as seen below on screenshot. Text that is shown as 'squares' is actually latin text. Chinese text is displayed properly in menus and other parts of application. I'm using QQ for years now running in wine and this is first time I ran in this issue. If I click on Message History button, right part of window is expanded showing unformatted text and these 'squares' are displayed properly.